1983

7.9

2017

5.7

2010

8.2

2005

8.5

1961

7.0

2001

7.9

2012

6.3

1979

6.8

2025

8.6

2019

7.4

2010

8.0

2009

8.3

2013

8.1

1995

6.4

1992

7.9

1957

7.8

2019

8.0

2024

6.6

2004

8.0

2017

7.7